Im having windows XP Professional in my laptop. 2 weeks before i got internet connection. everything was working properly. but for the past 4 days net is not working. i call the network professionals to see what is the problem. but they said , laptop has some problem and i have to reformat it. but my LAN connection , everything is ok. i donno how to reformat it. but i dont think that my laptop has some problem, can anyone tell me any idea to fix the prob...?